<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>

<canvas><canvas id="foo" width="65536" height="65536"></canvas>
<script>
test(function() {
  window.addEventListener("load", () => {
      document.implementation.createHTMLDocument().createElement("canvas").getContext("2d", {"desynchronized": true});
  })
}, "Trying to create a desynchronized frameless canvas should not crash.");
</script>
